Jul 4, 2026

• Canonical bridge-free integration: github.com/shrec/…/blob/…/LIBBITCOIN_INTEGRATION.md#…
• GPU opt-in contract: github.com/shrec/…/blob/…/LIBBITCOIN_INTEGRATION.md#…
• libbitcoin batch/column mapping example: github.com/shrec/…/blob/…/LIBBITCOIN_INTEGRATION.md#…
• Validation checklist: github.com/shrec/…/blob/…/LIBBITCOIN_INTEGRATION.md#…

• Direct C++ header entrypoint: github.com/shrec/…/blob/…/libbitcoin.hpp#…
• Direct verify API functions: github.com/shrec/…/blob/…/libbitcoin.hpp#…
• CMake target + GPU opt-in flag: github.com/shrec/…/blob/…/CMakeLists.txt#…
• Direct GPU hook smoke wiring: github.com/shrec/…/blob/…/CMakeLists.txt#…
• Correctness test example: github.com/shrec/…/blob/…/test_direct_verify.cpp#…
• GPU hook smoke test: github.com/shrec/…/blob/…/test_direct_gpu_columns_hook.cpp#…
• Direct benchmark example: github.com/shrec/…/blob/…/bench_direct_batch.cpp#…

Here are the updated bridge-free libbitcoin integration docs and examples. The canonical path is header-only C++ via <ufsecp/libbitcoin.hpp> / ufsecp::lbtc::*, with one CMake target and no shim, no C ABI, and no bridge. GPU column acceleration is opt-in and internal to the engine; the libbitcoin caller API stays unchanged and falls back transparently to CPU.